$175 Find Cheap Flights from Chicago O'Hare Airport to Saint Lucia - Compare and Save

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Price, demand and travel trends for Chicago O'Hare Intl Airport to Saint Lucia flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

Are flights from Chicago O'Hare Intl Airport to Saint Lucia cheaper or more expensive than last year?

Fares from Chicago O'Hare Intl Airport to Saint Lucia are running about 9% higher than they were around this time last year, averaging $829 round-trip.

What are the cheapest fares from Chicago O'Hare Intl Airport to Saint Lucia right now?

The cheapest fare from Chicago O'Hare Intl Airport to Saint Lucia in the last week was $464 round-trip, to Castries Hewanorra (UVF).

What’s the cheapest month to fly from Chicago O'Hare Intl Airport to Saint Lucia?

January is the cheapest time of year to fly, with average fares of $750. Prices are highest in March, when average flight costs increase to around $974.

When is the best time to book flights from Chicago O'Hare Intl Airport to Saint Lucia?

Book your flights 10 weeks before your trip. KAYAK data collected over the past 12 months shows that booking in this window can save you around 30% compared to booking last-minute (within 2 weeks of departure).

Which airport in Saint Lucia is the cheapest to fly to from Chicago O'Hare Intl Airport?

Based on KAYAK data from the past 12 months, the cheapest airports to fly into Saint Lucia are:

• Castries George F. L. Charle (SLU) from $783
• Castries Hewanorra (UVF) from $830

What’s the cheapest day to fly from Chicago O'Hare Intl Airport to Saint Lucia?

Wednesday tends to be the cheapest day to fly from Chicago O'Hare Intl Airport to Saint Lucia, while Saturday is the most expensive. Fares run about 32% higher that day, based on the past 12 months of KAYAK data.

What's the cheapest time of day to fly from Chicago O'Hare Intl Airport to Saint Lucia?

Data from the past 12 months shows it's cheapest to fly to Saint Lucia during the night with average prices of $627. The evening is the most expensive time to fly, with average prices of $862.

Key details for Chicago O'Hare Intl Airport to Saint Lucia flights

Low season

September

Cheapest flight

$175
Beat the crowds with an average 36% drop in travelers.
The most popular month to fly with an average 40% increase in travelers.
One-way flight from Chicago O'Hare Intl Airport to Castries

Your Chicago O'Hare Intl Airport to Saint Lucia flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • Is now a good time to book a flight from Chicago O'Hare Intl Airport to Saint Lucia?

    Yes. Fares from Chicago O'Hare Intl Airport to Saint Lucia are low right now. As a rule of thumb, a round-trip under $693 (cheaper than most fares this year) is a good deal, so if you spot one at or below that, it's a good time to book.

  • How much should I budget for a flight from Chicago O'Hare Intl Airport to Saint Lucia?

    Over the past 12 months, round-trip fares from Chicago O'Hare Intl Airport to Saint Lucia have ranged from $693 to $1,067.

  • What are the main airports serving Saint Lucia?

    Flights to Saint Lucia use two main airports, Castries George F. L. Charle (SLU) and Castries Hewanorra (UVF).

  • What airlines fly nonstop from Chicago O'Hare Intl Airport to Saint Lucia?

    Based on the flight schedule for the next 3 months, just one airline regularly flies nonstop from Chicago O'Hare Intl Airport to Saint Lucia: United Airlines.

  • Is it cheaper to fly with a layover from Chicago O'Hare Intl Airport to Saint Lucia?

    Yes. Nonstop flights from Chicago O'Hare Intl Airport to Saint Lucia average $1,150 over the past 12 months, but flights with a layover can cost less. The most affordable connecting airports are:

    • Toronto Pearson Intl (YYZ) from $527
    • New York John F Kennedy Intl (JFK) from $658
    • Miami (MIA) from $824

  • How long is a flight from Chicago O'Hare Intl Airport to Saint Lucia?

    Flights from Chicago O'Hare Intl Airport to Saint Lucia take 5h 33m on average.

  • Which cabin classes are available on flights from Chicago O'Hare Intl Airport to Saint Lucia?

    On flights from Chicago O'Hare Intl Airport to Saint Lucia you can only book Economy Class.

  • What are the earliest and latest flights from Chicago O'Hare Intl Airport to Saint Lucia?

    The earliest nonstop flight from Chicago O'Hare Intl Airport to Saint Lucia departs at 8:52 am and the latest departs at 8:52 am. Nonstop flights take about 5h 33m.

Your guide to booking Chicago O'Hare Intl Airport to Saint Lucia flights

Get tips on when to book, when to fly and what to know before your trip.
  • If you can plan ahead, the sweet spot for booking your flight is 10 weeks before your trip. KAYAK data shows fares in this window are around 30% lower than last-minute bookings (made within 2 weeks of departure). Not ready to commit? Set a Price Alert and we'll let you know when prices change.
  • If your travel dates are flexible, book your trip for January when flights are typically cheapest and avoid March when prices are at their highest.
  • Flying on Wednesday is usually the cheapest. Flights on Saturday cost about 32% more on average, so being flexible with your travel dates could help you save.
  • If you're looking to save, Castries George F. L. Charle (SLU) is the cheapest airport to fly into from Chicago O'Hare Intl Airport. If you have onward travel, don't forget to factor in the cost of your journey by train, bus or domestic flight.
  • Start your trip in Castries, which is the most popular destination in Saint Lucia. From there, it's easy to continue on to other popular destinations such as Soufrière, Gros Islet and Vieux Fort.
  • If you want the shortest trip, choose the Chicago O'Hare Intl Airport to Saint Lucia nonstop route. If you'd rather save money, the route via Toronto Pearson Intl (YYZ) is usually the cheapest.

Reviews of the top 3 airlines serving from O'Hare Intl to Saint Lucia

 
Need help choosing which airline to fly with from O'Hare Intl to Saint Lucia? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
DeltaOverall score based on 8663 reviews
7.8Comfort
7.8Entertainment
8.5Crew
7.2Food
8.1Boarding
Airline reviews

No beverage/snack service without any explanation or reason. Late boarding and delayed flight.

4.0 OkayKathryn, Oct 2026
Read more Delta reviews

No beverage/snack service without any explanation or reason. Late boarding and delayed flight.

The cabin and bathroom experience was poor as the cabin and bathroom were dirty and showed signs of an older plane that had not been updated for Customer’s, comfort and health. There was gum on my seat when I arrived and dirt spots around the fan and light controls. The flight was almost entirely full, so there was no way I could be moved from my seat. Th bathroom had the peeling paint.

I'm 6' 2" and even in economy plenty of leg room

Horrible experience. Delta delayed the flight to 11pm which happens. Apparently the pilots were there but we were waiting for flight attendants to arrive from Detroit and they were delayed. They could have made arrangements but that’s fine. What was truly horrible was that at 10:50pm the pilot comes out and says the flight will be cancelled but hasn’t been cancelled yet in the system. It’s being cancelled because the pilots have timed out. As soon as that plane got delayed past 10:50pm delta knew it couldn’t fly. Yet they made us wait around for hours. When the flight finally got cancelled all the area hotels were booked and flights for the next day were unavailable until midday. All I wanted was to spend one day with my family before needing to fly abroad on another delta flight. That will be my last flight with them. I’ll take my 800k miles flown and annual spend to an airline that isn’t so thoughtless.

THI IS THE 3RD CONSECUTIVE FLIGHT FROM ORD TO MSP THAT HAS BEEN DELAYED 2+ HOURS. CRAZY

The plane was a rather tired 737-800, with old style small luggage bins. Poor air flow. USB charger in the infotainment system was not functioning. The flight was 2 hours late due to crew rest requirements (not their fault). On arrival in Seattle, waited on the tarmac for 30 minutes with very few updates from the crew.

Very easy to use and convenient, you can perform any action within the same portal

Okay considering we had weather delays which the Pilot notified us of immediately!

Everything could have benn better. Short fly, no food, no entertainment and no wifi.

Stop changing gates. Stop cancelling flights Stop moving my seat.

I especially enjoyed having a lightly packed flight which enabled me and my wife to occupy a three seat area with nobody in the middle seat.

The seats are very small, that is all the staff did a good job.

It was great. The staff is always helpful and polite. The app is great and makes the whole trip and process so easy. They even offer a step to step guide to your correct terminal. And they keep all the information you'll need updated. Anything you can think of! Great experience.

Perfect. On time and the weather was perfect so we came in a few minutes early.

On time. Carry on and personal bag was accommodated on the plane. Entertainment was accessible without bringing own device. Whole can of juice was provided rather than a pour.

Price was crazy watch it if you Chan he your flight

On time, easy boarding. Anytime you sit in an economy seat, it’s uncomfortable. New plane and the bathrooms were in the galley at the back of the plane which seemed odd.

Terrible service - they don’t want to be there and bad food. Entertainment system in economy from the 2000s

No drink service but there was no N/A as an option to choose. Seats were extremely tight. I am under 5.5 and I bumped my knees have no idea how taller people could manage.

Flight delayed, last seat on the plane, no arrival Gate available due to the plane departing late

Crew were helpful, pilot kept us informed about turbulence, snack choice was awesome!

It was one of the worst I have ever had. The plane was over booked, and I did not have a seat. When I questioned why because I had booked this weeks in advance. I was brushed off to be advised they are trying to find someone to give up their seat. Only to be advised I would be boarding last. I had priority boarding in group 1-4. When I asked why I had to be last because that is not what I paid for I was advised it doesn't matter you will get a seat. The ticket person was very rude and unprofessional. The gate changed several times and it was going from one area to another area far away from where we were at. I feel like I should have been compensated in some kind of way because of the way I was treated. The ticket agent acted like it was my fault that the plane was over booked. Not one time was I apologized to for this inconvenience.

We did not fly on American Airlines from Chicago to London. We were rebooked on British Airways (by American Airlines) and our luggage was left behind. A full day delay and lost luggage.

I have posted the comments in the first flight leg.

First class snacks - stewardess gave out multiples to everyone until there was almost no selection left when she got back to me last in first class cabin. Nothing left that I would eat.

My feedback from the trip to Columbia to Chicago was meant for Chicago to Denver.

The WiFi was out gr entire flight. Had to Diane for almost 1 hour to wait for a gate to open up for plane to dock. Very bad experience.

After boarding, the AC was shut off on the flight. At business class, I really could not breathe. I was absolutely dripping sweat. I was told by the FA that there was nothing they could do but I could stand by the door until departure. So, that's what I did. I was clearly in the way while the FAs were trying to do their work, but I had to be able to breathe. After that, of course, I had sweated up a lot so was very uncomfortable for the six hour flight.

DELAYED AGAIN and AGAIN and AGAIN - not only that, you delay in 20 minute increments for hours and hours instead of having an accurate delay understanding.

AA was fine....the overall experience was subpar, but not due to the airline due to broader issues

More options for your flight from O'Hare Intl to Saint Lucia

Complete your trip to Saint Lucia with a hotel stay or car rental